The Justice Department had no comment.
The decision comes as President Joe Biden has promised his administration would not rest following the jury's verdict in the case. In a Tuesday evening speech, he said much more needed to be done.
“‘I can’t breathe.’ Those were George Floyd’s last words,” Biden said. “We can’t let those words die with him. We have to keep hearing those words. We must not turn away. We can’t turn away.”
The Justice Department had previously considered opening a pattern and practice investigation into the police department soon after Floyd’s death, but Attorney General William Barr was hesitant to do so at the time, fearing that it could cause further divisions in law enforcement amid widespread protests and civil unrest, three people familiar with the matter told the AP.